Lifting clamp



FIG. 1 is a top perspective view of a lifting clamp showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the drawings are for the purpose of illustrating unclaimed portions of the lifting clamp and form no part of the claimed design. 

CLAIM The ornamental design for a lifting clamp, as shown and described. 